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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






2. Duct through penis that carries sperm and urine






3. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






4. (LH) causes female's egg to break (her period)






5. Male on one pin and female on other side






6. Duct through penis that carries sperm and urine






7. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






8. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






9. ~60 days before calving






10. Milk is 15% ________ and 85% __________.






11. Animals which have only one estrous cycle (ex: dog - fox)






12. Look for infection - split - and rupture of the penis






13. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






14. 114 days






15. When are dairy cattle dehorned?






16. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






17. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






18. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






19. What helps regulate spermatogenesis?






20. Luteolysis happens because of the ____________ hormone






21. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






22. Animals which have only one estrous cycle (ex: dog - fox)






23. Animal which has been castrated after puberty






24. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






25. Urinary calculi.






26. 265-285 days






27. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






28. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






29. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






30. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






31. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






32. Animals which have many estrous periods per year (ex: cow - sow)






33. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






34. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






35. 14-19 (17) days






36. 14-19 (17) days






37. When are steers and heifers weaned from bottle feeding?






38. Days which have decreasing daylight hours

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39. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






40. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






41. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






42. The more stressed out the male is - the less sperm he is going to produce






43. ~305 days (altough often longer due to breeding difficulties)






44. 1-2 days






45. The more stressed out the male is - the less sperm he is going to produce






46. Sperm production






47. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






48. 24 hours before end of estrus cycle






49. Why does estrus happen before ovulation?






50. 24 hours before end of estrus cycle